In a certain region of space electric field is along the z direction throughuot the magnitude of electric is however not constant `10^(-5) NC^(-1)` per meter what are the force torque experienced by a system having a total dipole equal to `10^(-7)` cm in the negative z direction

Explanation

Only (c ) is right the rest cannot represent electrostaic field lines (a) is wrong because field lines must be normal to a conlductor (b) is wrong because field lines cannot start wrong because electrostatic field lines cannot form closed loops